A flushing device for a petroleum drilling well packer

Abstract

The utility model discloses a kind of petroleum well drilling well packer flushing device, including rack, cleaning pool is equipped on rack, loading card seat is equipped on cleaning pool, clamping jaw is distributed on loading card seat, the bottom end of loading card seat is placed with turntable, driving assembly that driving turntable rotates is equipped on rack, washing liquid filter component is equipped on cleaning pool, flushing spray head is equipped on the side of cleaning pool in loading card seat, flushing spray head is connected with pressure pump, and pressure pump input end is connected into cleaning pool. The well packer to be washed is placed on loading card seat, it is fixed by clamping jaw, then start driving assembly to drive turntable rotation, well packer slowly rotates in succession;While pressure pump extracts washing liquid that is preliminarily purified from cleaning pool through washing liquid filter component, and the surface of well packer in rotation is continuously washed by flushing spray head. Realize the on-site loading of well packer, rotation cleaning and washing liquid preliminary recycling, both ensure the comprehensiveness of washing, and avoid the direct discharge of washing liquid.

Description

Technical Field

[0001] This utility model relates to the field of oil well sealing device technology. Background Technology

[0002] The blowout preventer (BOP), also known as a wellhead sealer, is a core well control device used in oil drilling, well workover, and well testing operations to control wellhead pressure and prevent blowouts. Its performance stability directly affects the safety and efficiency of drilling operations. During drilling, due to harsh operating conditions and complex processes, oil-based mud and crude oil often splash and adhere to the surface of the BOP, while mud and other impurities easily remain in its internal cavity and sealing surfaces. If not thoroughly cleaned over a long period, these deposits will not only corrode the equipment surface and reduce its structural strength, but also lead to serious problems such as aging of seals and improper gate closure, ultimately affecting well control safety. Therefore, the wellhead sealer must undergo a cleaning process after each use and return to the factory for maintenance to remove oil and mud adhering to its surface and internal cavity, creating conditions for subsequent disassembly, inspection, parts replacement, seal testing, and reassembly. However, wellhead sealers are typically heavy, bulky, and irregularly shaped, which poses significant challenges to cleaning.

[0003] Currently, the industry still widely uses the traditional method of manually rinsing wellhead sealers with handheld high-pressure water guns, which has several technical drawbacks. Firstly, in terms of cleaning efficiency, manual rinsing covers a small area, takes a long time, and is extremely inefficient. Furthermore, it's difficult to effectively clean the critical internal parts of the wellhead sealer, easily leaving blind spots. Secondly, regarding operational safety, cleaning personnel must operate above the blowout preventer at the wellhead. The mud adhering to the equipment surface easily causes slips and falls, and the wellhead area is a high-pressure and falling object hazard zone, posing significant safety risks. In some drilling sites, even entering this area requires a work permit, making the cleaning process extremely cumbersome. Especially in low-temperature winter environments, the deposits on the wellhead sealer surface freeze, forming a frozen layer that must be melted before cleaning, which is time-consuming, labor-intensive, and energy-wasting. In addition, this traditional cleaning method is a completely open operation, with large amounts of wastewater being directly discharged, making it impossible to recycle the cleaning water. Although some improvement solutions have been reported, such as using horizontal and vertical sliding beams on the top and sides of the frame to drive the nozzle movement, their structures are relatively complex and the spray coverage is still limited, making it difficult to achieve balanced flushing of all parts of the well sealer. Therefore, a more efficient well sealer flushing device is urgently needed.

[0004] In summary, the existing manual high-pressure water jet flushing method can no longer meet the requirements of well sealer maintenance operations for cleaning efficiency, cleaning quality and environmental performance. The industry urgently needs a flushing device that can achieve automated, all-round deep cleaning of well sealers. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a flushing device for oil drilling well sealers.

[0006] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0007] A flushing device for an oil drilling well sealer includes a frame, a cleaning tank on the frame, a loading seat on the cleaning tank, claws distributed on the loading seat, a turntable mounted at the bottom of the loading seat, a drive assembly on the frame to drive the turntable to rotate, a washing fluid filtration assembly on the cleaning tank, a flushing nozzle on one side of the cleaning tank near the loading seat, and a pressure pump connected to the flushing nozzle, with the input end of the pressure pump connected to the cleaning tank.

[0008] The above-described method involves placing the wellhead sealer to be cleaned onto a loading bracket within the cleaning tank and securing it with jaws. The drive assembly is then activated to rotate the turntable, causing the wellhead sealer to slowly rotate. Simultaneously, a pressure pump draws cleaning fluid, pre-purified by the washing fluid filtration assembly, from the cleaning tank and continuously flushes the surface of the rotating wellhead sealer through flushing nozzles. This method achieves on-site loading, rotational cleaning, and preliminary recycling of the washing fluid, ensuring thorough flushing while preventing direct discharge of the cleaning fluid. It features a compact structure and convenient operation.

[0009] Furthermore, the loading bracket has a groove distributed along its center, the claw slides along the groove, and the loading bracket is provided with a screw, the claw being screwed to the screw.

[0010] With the above solution, on the loading bracket, the operator can drive the chuck to slide bidirectionally along the slide groove by rotating the screw, thereby adjusting the clamping position of the chuck according to the actual size of the bottom flange of the well sealer, so as to achieve rapid centering and reliable locking.

[0011] Furthermore, the drive assembly includes a gear ring disposed on the outer periphery of the turntable, a drive tooth is provided along the lower end of the gear ring on the frame, the drive tooth is connected to a drive shaft, a geared motor is provided on the frame, and the output end of the geared motor is connected to the drive shaft.

[0012] With the above scheme, when the geared motor starts, its output end drives the drive teeth to rotate via the drive shaft. The drive teeth mesh with the gear ring fixed on the outer circumference of the turntable, thereby smoothly driving the turntable and the well sealing device mounted on it to rotate at a low speed. This gear transmission method has a strong load-bearing capacity and uniform rotation, providing a stable and controllable rotation speed for flushing operations.

[0013] Furthermore, the gear ring is located on the lower end face of the turntable, the drive teeth are located below the turntable, and a guide plate is provided on the outer edge of the turntable.

[0014] With the above solution, the gear ring is set on the lower end face of the turntable, and the drive teeth are arranged below the turntable, so that the transmission components are hidden at the bottom of the turntable, reducing the direct splashing of cleaning fluid onto the tooth surface, which can cause lubrication failure or corrosion. At the same time, a guide plate is set on the outer edge of the turntable, which can guide the washing fluid falling during the rinsing process into the cleaning tank.

[0015] Furthermore, the cleaning pool is surrounded by a protective fence, which is connected to the cleaning pool by a plug-in connection. The protective fence includes multiple panels, which are connected to adjacent panels by hinges. The protective fence has an unfolded enclosure state and a folded-down state.

[0016] With the above solution, the fence is made up of multiple panels connected in sequence by hinges. It can be unfolded to form a barrier during cleaning to prevent the washing fluid from splashing into the operating area. When hoisting and unloading the well sealer, the fence can be easily folded up without interfering with the entry and exit of the equipment.

[0017] Furthermore, the washing liquid filtration assembly includes a sedimentation tank, a filtration tank, and a mixing tank disposed within the cleaning tank. The washing liquid flows between the sedimentation tank and the filtration tank through an overflow port. The filtration tank is equipped with a filter cage, and the filter cage is equipped with a pumping pipe. The pumping pipe leads to the mixing tank, and the input end of the pressure pump is connected to the mixing tank through a pipe.

[0018] Through the above scheme, the washing liquid flows into the cleaning tank after rinsing. First, it enters the sedimentation tank to settle large particles of silt. The clear liquid on the top overflows into the filtration tank, where fine impurities are further removed by the filter cage. The clean washing liquid enters the distribution tank through the pump pipeline, and then is pumped by the pressurized pump to supply the rinsing nozzles. This realizes online purification and recycling of the washing liquid, which greatly reduces the consumption of clean water and the discharge of waste liquid. At the same time, the pump-suction structure of the filter cage avoids premature clogging of the filter.

[0019] Furthermore, a hoisting electric hoist is provided on the frame at the upper end of the cleaning pool.

[0020] The above scheme involves installing a hoisting electric hoist on the upper part of the frame for vertical lifting and horizontal movement of the well sealing device.

[0021] Furthermore, the frame is equipped with a drying device, which includes a fan and a heater. The airflow blown out by the fan is heated by the heater and then used to dry the well sealer after flushing. The output end of the fan is positioned directly opposite the turntable.

[0022] With the above method, after the rinsing operation is completed, the drying device is started. The fan draws in ambient air and heats it into hot air through the heater. The hot air is blown towards the cleaned wellhead surface in the direction of the rotary table. Since the wellhead can still rotate slowly under the drive of the rotary table, the hot air can evenly cover its inner and outer surfaces, quickly evaporate residual moisture, and prevent metal corrosion or aging of seals caused by the humid environment, thus realizing integrated continuous operation of cleaning and drying.

[0023] The beneficial effects of this utility model are as follows: 1. This device integrates loading and positioning, rotary flushing, washing fluid circulation filtration and hot air drying, forming a complete production line for deep cleaning after well sealing device recovery. It significantly improves cleaning efficiency and automation. Through multi-stage filtration and washing fluid circulation system, it greatly reduces clean water consumption and waste liquid discharge. At the same time, it optimizes transmission protection and fence folding structure, taking into account equipment reliability, operational safety and environmental economy. 2. Start the drying device. The fan draws in ambient air and heats it into hot air through the heater. The hot air is then blown directly onto the cleaned wellhead surface in the direction of the turntable. Because the wellhead continues to rotate slowly under the drive of the turntable, the hot air can evenly cover its inner and outer surfaces, quickly evaporating residual moisture and preventing metal corrosion or aging of seals caused by a humid environment. This achieves integrated and continuous cleaning and drying operations, improving the equipment's maintenance efficiency. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a partial structural diagram of the cleaning tank of this utility model, which is taken from a side view perspective; Figure 3 yes Figure 1 Enlarged structural diagram of section A.

[0025] Reference numerals: 11. Frame; 12. Cleaning tank; 13. Loading seat; 14. Claw; 15. Turntable; 16. Flushing nozzle; 17. Pressure pump; 18. Slide chute; 19. Screw; 21. Drive gear; 22. Drive shaft; 23. Gear motor; 24. Guide plate; 25. Protective fence; 26. Guardrail; 28. Sedimentation tank; 29. ​​Filtration tank; 30. Liquid preparation tank; 32. Filter cage; 35. Hoisting electric hoist; 37. Fan; 38. Heater. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0028] Example 1 like Figure 1 and Figure 2 and Figure 3 This embodiment provides a flushing device for oil drilling well sealers, including a frame 11, a cleaning tank 12 on the frame 11, a hoisting electric hoist 35 on the upper end of the cleaning tank 12 on the frame 11, a loading seat 13 on the cleaning tank 12, claws 14 distributed on the loading seat 13, a turntable 15 at the bottom end of the loading seat 13, a drive assembly for driving the turntable 15 to rotate on the frame 11, a washing fluid filtration assembly on the cleaning tank 12, a flushing nozzle 16 on one side of the loading seat 13 on the cleaning tank 12, a pressure pump 17 connected to the flushing nozzle 16, and the input end of the pressure pump 17 is connected to the cleaning tank 12. A hoist 35 is installed on the upper end of the frame 11 for vertical lifting and horizontal movement of the well sealer. The well sealer to be cleaned is placed on the loading bracket 13 in the cleaning tank 12 and fixed by the jaws 14. Then, the drive assembly is started to rotate the turntable 15, and the well sealer rotates slowly accordingly. At the same time, the pressure pump 17 draws cleaning fluid that has been preliminarily purified by the washing fluid filtration assembly from the cleaning tank 12, and continuously washes the surface of the rotating well sealer through the flushing nozzle 16. This achieves on-site loading, rotational cleaning, and preliminary recycling of the washing fluid for the well sealer, ensuring comprehensive flushing while avoiding direct discharge of the cleaning fluid. The structure is compact and easy to operate.

[0029] Reference Figure 1 and Figure 2 and Figure 3The loading bracket 13 has a sliding groove 18 distributed along the center of the upper edge. The claw 14 slides along the sliding groove 18. The loading bracket 13 is provided with a screw 19. The claw 14 is screwed to the screw 19. The drive assembly includes a gear ring located on the outer periphery of the turntable 15 (the gear ring is located on the lower edge of the outer periphery of the turntable in the figure and is not shown in the figure). The frame 11 is provided with a drive tooth 21 along the lower end of the gear ring. The drive tooth 21 is connected to the drive shaft 22. The frame 11 is provided with a reduction motor 23. The output end of the reduction motor 23 is connected to the drive shaft 22. On the loading bracket 13, the operator can drive the jaws 14 to slide bidirectionally along the slide groove 18 by rotating the screw 19, thereby adjusting the clamping position of the jaws 14 according to the actual size of the bottom flange of the well sealer, achieving rapid centering and reliable locking. When the reduction motor 23 starts, its output end drives the drive gear 21 to rotate through the drive shaft 22. The drive gear 21 meshes with the gear ring fixed on the outer circumference of the turntable 15, thereby smoothly driving the turntable 15 and the well sealer loaded on it to rotate at a low speed. This gear transmission method has a strong load-bearing capacity and uniform rotation, and can provide a stable and controllable rotation speed for flushing operations. The gear ring is located on the lower end face of the turntable 15, the drive tooth 21 is located below the turntable 15, and the guide plate 24 is provided on the outer edge of the turntable 15. By placing the gear ring on the lower end face of the turntable 15 and the drive tooth 21 below the turntable 15, the transmission components are hidden at the bottom of the turntable 15, reducing the direct splashing of cleaning fluid onto the tooth surface, which could cause lubrication failure or corrosion. At the same time, the guide plate 24 on the outer edge of the turntable 15 can guide the washing fluid that falls during the rinsing process into the cleaning tank 12.

[0030] Reference Figure 1 and Figure 2 The cleaning pool 12 is equipped with a protective fence 25 around the loading seat 13. The protective fence 25 is connected to the cleaning pool 12 by plug-in connection. The protective fence 25 includes multiple panels 26. Adjacent panels 26 are connected by hinges. The protective fence 25 has an unfolded enclosure state and a folded and retracted state. The fence is composed of multiple panels 26 connected in sequence by hinges. It can be unfolded to form an enclosure state during cleaning to prevent washing fluid from splashing into the operating area. When hoisting and unloading the well sealing device, the fence can be easily folded and retracted without interfering with the entry and exit of the equipment.

[0031] Reference Figure 1 and Figure 2The washing liquid filtration assembly includes a sedimentation tank 28, a filtration tank 29, and a mixing tank 30 located within the cleaning tank 12. The washing liquid flows between the sedimentation tank 28 and the filtration tank 29 through an overflow port. A filter cage 32 is installed in the filtration tank 29, and a pumping pipe is installed inside the filter cage 32. The pumping pipe leads to the mixing tank 30, and the input end of the pressure pump 17 is connected to the mixing tank 30 through a pipe. After rinsing, the washing liquid flows into the cleaning tank 12, first entering the sedimentation tank 28 to settle large particles of silt. The upper clear liquid enters the filtration tank 29 through the overflow port, where fine impurities are further removed by the filter cage 32. The clean washing liquid enters the mixing tank 30 through the pumping pipe, and is then pumped by the pressure pump 17 to supply the rinsing nozzle 16. This achieves online purification and recycling of the washing liquid, significantly reducing water consumption and waste liquid discharge. At the same time, the pump-suction structure of the filter cage 32 prevents premature clogging of the filter.

[0032] Reference Figure 1 and Figure 2 A drying device is installed on the frame 11, which includes a fan 37 and a heater 38. The airflow blown by the fan 37 is heated by the heater 38 and then dries the well sealer after rinsing. In this embodiment, the heater 38 is an electric heating wire. The output end of the fan 37 is positioned directly opposite the turntable 15. After the rinsing operation is completed, the drying device is started. The fan 37 draws in ambient air and heats it into hot airflow through the heater 38. The hot airflow is blown directly onto the cleaned surface of the well sealer in the direction of the turntable 15. Since the well sealer can still rotate slowly under the drive of the turntable 15, the hot air can evenly cover its inner and outer surfaces, quickly evaporate residual moisture, and prevent metal corrosion or aging of seals caused by a humid environment, thus realizing integrated continuous operation of cleaning and drying.

[0033] It should be noted that the connection relationships of components not specifically mentioned in this application are all assumed to be based on existing technology. Since they do not involve the inventive point and are commonly used in existing technology, the structural connection relationships are not described in detail.

Claims

1. A flushing device for oil well sealing equipment, characterized in that, The system includes a frame (11), a cleaning tank (12) on the frame (11), a loading seat (13) on the cleaning tank (12), claws (14) distributed on the loading seat (13), a turntable (15) at the bottom of the loading seat (13), a drive assembly for driving the turntable (15) to rotate on the frame (11), a washing liquid filtration assembly on the cleaning tank (12), and a rinsing nozzle (16) on one side of the loading seat (13) in the cleaning tank (12). The rinsing nozzle (16) is connected to a pressure pump (17). The input end of the pressurizing pump (17) is connected to the cleaning tank (12). The washing liquid filtration assembly includes a sedimentation tank (28), a filtration tank (29) and a mixing tank (30) located in the cleaning tank (12). The washing liquid flows between the sedimentation tank (28) and the filtration tank (29) through an overflow port. A filter cage (32) is provided in the filtration tank (29). A pumping pipe is provided in the filter cage (32). The pumping pipe is connected to the mixing tank (30). The input end of the pressurizing pump (17) is connected to the mixing tank (30) through a pipe. A drying device is provided on the frame (11).

2. The oil well sealing device flushing apparatus according to claim 1, characterized in that, The loading bracket (13) has a groove (18) distributed along the center, and the claw (14) slides along the groove (18). The loading bracket (13) is provided with a screw (19), and the claw (14) is screwed to the screw (19).

3. The oil well sealing device flushing apparatus according to claim 1, characterized in that, The drive assembly includes a gear ring disposed on the outer periphery of the turntable (15), a drive tooth (21) is provided on the frame (11) along the lower end of the gear ring, the drive tooth (21) is connected to a drive shaft (22), a geared motor (23) is provided on the frame (11), and the output end of the geared motor (23) is connected to the drive shaft (22).

4. The oil well sealing device flushing apparatus according to claim 3, characterized in that, The gear ring is located on the lower end face of the turntable (15), the drive tooth (21) is located below the turntable (15), and the outer edge of the turntable (15) is provided with a guide plate (24).

5. The oil well sealing device flushing apparatus according to claim 3, characterized in that, The cleaning pool (12) is provided with a protective fence (25) around the loading seat (13). The protective fence (25) is connected to the cleaning pool (12) by plug-in connection. The protective fence (25) includes multiple panels (26). Adjacent panels (26) are connected by hinges. The protective fence (25) has an unfolded enclosure state and a folded and retracted state.

6. The oil well sealing device flushing apparatus according to claim 1, characterized in that, A hoisting electric hoist (35) is provided on the frame (11) at the upper end of the cleaning tank (12).

7. The oil well sealing device flushing apparatus according to claim 1, characterized in that, The drying device includes a blower (37) and a heater (38). The airflow blown out by the blower (37) is heated by the heater (38) and then used to dry the well sealer after flushing. The output end of the blower (37) is set directly opposite the turntable (15).

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